11212322143 has 4 divisors (see below), whose sum is σ = 12231624168. Its totient is φ = 10193020120.

The previous prime is 11212322129. The next prime is 11212322153. The reversal of 11212322143 is 34122321211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34122321211 = 11 ⋅3102029201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11212322143 is a prime.

It is a super-2 number, since 2×11212322143² (a number of 21 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11212322153) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509650996 + ... + 509651017.

It is an arithmetic number, because the mean of its divisors is an integer number (3057906042).

Almost surely, 2^11212322143 is an apocalyptic number.

11212322143 is a deficient number, since it is larger than the sum of its proper divisors (1019302025).

11212322143 is a wasteful number, since it uses less digits than its factorization.

11212322143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1019302024.

The product of its digits is 576, while the sum is 22.

Adding to 11212322143 its reverse (34122321211), we get a palindrome (45334643354).

The spelling of 11212322143 in words is "eleven billion, two hundred twelve million, three hundred twenty-two thousand, one hundred forty-three".